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California's Gray Wolf Population Thrives, But Livestock Attacks Surge

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A female gray wolf outside.
Siskiyou, a female gray wolf, wanders through her habitat in the California Trail exhibit at the Oakland Zoo in Oakland on Friday, May 4, 2018.  (Paul Chinn/The San Francisco Chronicle via Getty Images)

California is once again home to gray wolves, a federally and state-protected endangered species, with its known population growing to over 50 wolves this year, up from zero for the better part of a century. However, a new report shows that attacks by wolf packs on livestock at ranches and farms have increased.

The latest numbers from California’s Department of Fish and Wildlife (CDFW) show several packs in the northern parts of the state with wolves in various stages of development. The largest known pack is in Tulare County, with 15 adult wolves, six juveniles, and seven pups. Wolves there are the farthest south they’ve yet to establish themselves in the state.

The CDFW report shows another trend that’s causing some alarm: a growing number of wolf packs are creeping into places where vulnerable livestock are grazing.

Axel Hunnicut, California’s gray wolf coordinator, said the wolves now share the land with more livestock than they did when they were last seen here a hundred years ago. That angers some ranchers and farmers, losing calves multiple times a week.

“It’s an easier meal for them,” Hunnicut said.

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All but one recent attack on livestock involved a calf. One attack in Siskiyou County in May was against a llama.

Most recently, four recent wolf attacks killed livestock in Siskiyou and Lassen counties, the latter of which was where the last gray wolf was spotted in California in 1924.

California’s predators, like the gray wolf and grizzly bear, were systematically extirpated during European colonization and subsequent attempts to conquer the West to make it safer for human development.

The wolves living in California now are descendants of the famed wolf reintroduction to Yellowstone National Park in Idaho in 1995. Their presence after a 70-year absence had a noticeable and profound impact on the local ecology, including cutting down the large deer population that had overgrazed the landscape due to the lack of predators.

As noted in several viral videos, deer began avoiding parts of Yellowstone where they were particularly vulnerable to being picked off by the wolves, allowing vegetation to regrow faster and trees to get bigger, bringing in beavers who ate the trees and built dams in waterways, which provided habitat for other species. This cascaded to other geological changes, including stabilizing river banks and creating lasting physical changes to the rivers.

Like humans before them, the gray wolves started moving west, with an adult male wolf in Oregon wearing a radio collar working his way into California in 2011. The first wolf pack was discovered four years later.

Since then, northeastern California has had a continuous wolf pack presence, including some being direct descendants of the lone wolf who crossed into the state 13 years ago.

An adult gray wolf can get up to 90 pounds, or the size of a large dog. Their paw prints, however, would dwarf any dog’s paw, getting up to five to six inches long.

A killing dilemma

California has changed since the last time wolves and humans shared the landscape.

“They’re not coming back to natural wilderness,” Hunnicut said.

In the 1920s, California’s population passed 4 million people. Now, there are 39 million people in the state and, as Hunnicut points out, more than one million heads of non-avian livestock – or cattle, sheep, goats, and pigs – and wolves can travel up to 12 miles a day looking for their next meal.

“A lot of that livestock is exactly where the wolves are,” Hunnicut said. “They’re in these rural, remote areas. To the average California citizen who might live in a more urban area, it is a novelty. It is exciting. ”

But at the same time, Hunnicut notes that workers in California’s agricultural sector face new challenges in the landscape in which they live and work every day.

The CDFW is responding to the wolf attacks on cattle by having discussions with boards of supervisors in places like Sierra and Plumas counties about what can be done to protect cattle while also respecting space for wolves.

But one option is entirely off the table: California doesn’t allow people to kill wolves, no matter how much livestock they kill.

“They’re a state and federally endangered species, so they have full rights and protection,” Hunnicut said, adding that there’s a need for strategies to deter wolves from hunting livestock. “Hopefully, we can find the tools and technology and the conversations to have with people to allow for native predators and people in the agricultural sector to flourish and be successful in their lives.”

Bay Area residents don’t have to worry about wolves snagging their livestock or even a pet. Hunnicut said the wolves living closest to the Bay Area are just north of the Tahoe Basin, but people shouldn’t seek them out.

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Should someone encounter a gray wolf in the wild and – in the extremely rare scenario the wolf actually engages – humans should try to look as big as possible and scare the wolf off. Should a wolf attack, humans should fight back.

But the only wolf attacks on record since they’ve returned to California are to livestock, an issue that many say needs a solution.

“With all natural resources, there’s always a contest, there’s always an issue, sometimes with our agricultural needs or social needs, or even our religious and personal beliefs versus native species and natural resources,” Hunnicut said. “But one thing is definitely there: there is a space for both. The issue is trying to figure out how that works because wolves do come at a cost.”

Editor’s note: The story has been updated to correct the number of non avian head of livestock currently in California.

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